USL BridgeCare has been contracted previously by Balfour Beatty in Summer 2009 to undertake waterproofing and joint works to the southbound carriageway. During these repairs, the edge of the adjacent deck on the northbound side was found to be showing similar signs of deterioration. It was decided that similar repairs were required to the northbound carriageway and USL BridgeCare was asked by AOne+, the managing agent for Area 14, to provide a complete package for the deck refurbishment works, which included:
Works were planned for the school summer holidays, commencing on 15th July 2013 with completion by 22nd August 2013 under two phases, phase 1 being hard shoulder and lane one and phase 2 being lane two.
Within this period there were approximately 32 days where only one lane would be open in a southbound direction. The volume of traffic carried by the road (around 100,000 vehicles per day) meant that it was essential that works were completed on time.
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Works were programmed to take place 24 hours a day, utilising lane closures between the hours of 0600 annd 2000 and full road closures at night.
With the live railway below the structure and overhead line equipment energised to 25,000 volts fitted to the soffit of the centre span deck and to bridge supports, hydro-demolition was not permitted as an option for removing concrete because of the volume of water required for this type of operation, so all breaking out was to be undertaken by hand.
Above: Exposed Concrete Deck and Anodes
Above: Concrete Repairs
Above: Britdex MDP Spray Applied Waterproofing Application
Above: FE Tack Coat Application